A numerical model that simulates the radiation regime inside a fully leafed and leafless deciduous forest canopy is discussed and tested. The model incorporates features which account for the vertical variation in leaf inclination angles and penumbral effects; these features have been experimentally shown to significantly influence …
Journal: Agricultural And Forest Meteorology, Volume 46 (4): 313-337 (1989). DOI: 10.1016/0168-1923(89)90034-8 Sites: US-WBW
An intensive investigation of particulate sulfur fluxes to a deciduous forest was conducted at Oak Ridge, Tennessee, during May 1983, as part of a multilaboratory program to study the dry deposition of airborne trace gases and aerosols to vegetated surfaces. At this time, the leaf area was approximately 50% of the maximum and was …
Journal: Journal Of Geophysical Research: Atmospheres, Volume 94 (D10): 13003-n/a (1989). DOI: 10.1029/jd094id10p13003 Sites: US-WBW
Ecologists are expected to play an important role in future studies of the biosphere/atmosphere exchange of materials associated with the major biogeochemical cycles and climate. Most studies of material …
Journal: Ecology, Volume 69 (5): 1331-1340 (1988). DOI: 10.2307/1941631 Sites: US-WBW
The processes influencing turbulence in a deciduous forest and the relevant length and time scales are investigated with spectral and cross-correlation analysis. Wind velocity power spectra were computed from three-dimensional wind velocity measurements …
Journal: Boundary-Layer Meteorology, Volume 45 (1-2): 31-58 (1988). DOI: 10.1007/bf00120814 Sites: US-WBW
Three-dimensional wind velocity components were measured at two levels above and at six levels within a fully-leafed deciduous forest. Greatest shear occurs in the upper 20% of the canopy, where over 70% of the foliage is concentrated. The turbulence structure …
Journal: Boundary-Layer Meteorology, Volume 43 (4): 345-364 (1988). DOI: 10.1007/bf00121712 Sites: US-WBW
A gaseous deposition model, based on a realistic canopy stomatal resistance submodel, is described, analyzed and tested. This model is designed as one of a hierarchy of simulations, leading up to a “big-leaf” model of the processes contributing to the exchange of trace …
Journal: Atmospheric Environment, Volume 21 (1): 91-101 (1987). DOI: 10.1016/0004-6981(87)90274-5 Sites: US-WBW
Journal: The Journal Of Ecology, Volume 74 (3): 635-676 (1986). DOI: 10.2307/2260387 Sites: US-WBW
Journal: Tree Physiology, Volume 2 (1-2-3): 155-168 (1986). DOI: 10.1093/treephys/2.1-2-3.155 Sites: US-WBW
Journal: The Journal Of Applied Ecology, Volume 23 (3): 967-977 (1986). DOI: 10.2307/2403948 Sites: US-WBW
The directional thermal infrared exitance distributions of a 21.5-m-tall leafless deciduous forest were measured using a rotating 7-detector array suspended 33 m above the forest floor. These distributions are presented for several illumination conditions. Strong directional thermal infrared distributions were observed at high solar …
Journal: IEEE Transactions On Geoscience And Remote Sensing, Volume GE-24 (5): 693-698 (1986). DOI: 10.1109/tgrs.1986.289616 Sites: US-WBW